Brush holder



June 21, 1932. E. J. NEwcoMER BRUSH HOLDER Filed Aug. 17, 1929 Patented June 21, 1932 UNLTED STATES PATENT `OFFICE ERNEST J'. NEWCOMER, OF YORK, PENNSYLVANIA, ASSIG-NOR T0 THE FLOOROLA COR- PORATION, F YORK, PENNSYLVANIA, A CORPORATION OF DELAWARE BRUSH HOLDER Application led August 17, 1929. Serial No. 386,684.

|This invention relates to an improvement in brush holders.

The object of this invention is to cause a frictional spring tension in the lock between .3 the brush and the holder as the brush is tightened in the latter, which increases the spring locking effect between the brush and the holder. A spring plate is carried by the brush with a downturned flared portion 1a threaded to receive the holder. As they are screwed together theholder compresses the flared portion, causing a spring locking effect therebetween.

In the accompanying drawing: Fig. 1 is a plan view of the brush holder; Fig. 2 is a sectional view therethrough; and Fig. 3 is a detail sectional view through-a portion of the brush.

The numeral 1 indicates the supporting im shaft for the brush, which may be driven by any suitable means, preferably by a machine, to which it is connected and geared for rota ry movement over the surface to be treated. The shaft 1 is fixed to a supporting plate 2 2:, having a downturned iiange on the outer edge thereof, and extending at right angles to the plate, as shown particularly in Fig. 2, which flange is internally screw-threaded.

A brush head Gris groovcd on its outer sur- 3a face as at 9 and has a plate 5 secured thereto by means of screws 8 or other fastening de.- vices, as shown in Fig. 2. This plate is preferably made of some thin flexible or resilient material. A threaded ring 4 extends 3f, downwardly from the outer edge of the plate 5, being formed integral therewith, and is disposed in the grooved portion 9 of the brush head but is free and clear of the brush head except where it is oined to the plate 5. The ring 4 is threaded to receive the threaded flange 3, but as shown in Fig. 3, when disconnected from said iiange, the ring 4, being of spring material, is flared to normally be disposed at an obtuse angle to the plate 5. This iiare is such that when the supporting ring 4t is screwed into the threaded flange S, the latter causes the spring metal ring 4 to be forced inward slightly, thus causing a spring locking effect between the brush and the 5o holder, as shown in Fig. 2. The groove 9 brush head having a peripheral groove therein, a plate fiXed to the end of the brush head and having the edge thereof bent back in said groove to form a ring, said ring being externally threaded and normally iiared outwardly to be compressed upon engagement with the brush holder.

2. The combination with a brush holder having an internally threaded portion, of a brush head having a peripheral groove therein, a plate fixed to theend of the brush head and having'the edge thereof bent back in said groove to form a ring, said ring being ex ternally threaded and normally flared outwardly to be compressed upon engagement with the brush holder, said ring being disconnected and free from the sides of the brush head.

3. The combination with a brush holder having an internally threaded portion, of a brush head, a plate fixed to the end of the brush head and having the edge thereof bent back to form a resilient ring, said ring being externall7 threaded and adapted to wedgingly engage the brush holder to be compressed upon engagement with the brush holder. said ring being spaced from the periphery of the brush head.

In testimony whereof I affix my signature.

ERNEST J. NEVVCOMER. 

